4.4 Suffix rules

To simplify a ‘Makefile’, there is a special kind of rule syntax
known as a suffix rule. This is a wildcard pattern that can
match targets. Our first ‘Makefile’ used some. Here is one:

.c.o:
$(CC) $(CFLAGS) -c $< -o $@

Unless a more specific rule matches the target being sought, this rule
will match any target that ends in ‘.o’. These files are said to
always be dependent on ‘.c’. With some background material now
presented, let’s take a look at these tools in use.